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Abstract

A combination of LED's has been used on VU meters to indicate volume level. However, volume level LEDs are used solely for the purpose of indi- cating volume level.

Copyright

Motorola Inc. June 1997

Country

United States

Language

English (United States)

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Technical Developments

USING COMBINATIONS OF LED'S ON A CHANNEL CONTROL MODULE (CCM) TO INDICATE STATUS

by Art Muszynski, Andrew Sapuntzakis and Dmitry Avramenko

BACKGROUND

channel control module (CCM), and to use these LEDs together to provide a recognizable pattern or indication to the operator. For example, 2 LED's out of, a series of 8 LEDs flashing interchangeably could be one status indicator while the same two LEDs flashing in sync would indicate another event. The list of possible status indications with two LED& top (T) and bottom (B) is listed below.

EXISTING INDICATIONS *TON *BON

l T FLASH

l B FLASH l TandB OFF

NEW INDICATIONS .TandBON

l T and B FLASH interchangeably

Fig. 1 CCMs with status LEDs

CCM LEDs are used in dispatch console operation to indicate status. Only a limited number of LEDs can be placed on a CCM. Sometimes a need arises to indicate more events than the number of available LEDs. Currently LEDs are used only individually. The available LED indications are ON, OFF, and FLASH.

PRIOR ART

A combination of LED's has been used on VU meters to indicate volume level. However, volume level LEDs are used solely for the purpose of indi- cating volume level.

SOLUTION

Our idea is to use two or more of the LEDs on a

l T and B FLASH in sync

The number of combinations will be much higher if we use 3 or more LEDs.

We could also combine a large number of LEDs and indicate status by turning LEDs on and off in a circular pattern. The sequence of...